CVE-2026-50647: high-severity vulnerability in Microsoft .NET Framework 3.5 AND 4.7.2
Active Directory Federation Server Denial of Service Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.2%
Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2Microsoft · Microsoft .NET Framework 3.5 AND 4.8Microsoft · Microsoft .NET Framework 3.5 AND 4.8.1Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft · Microsoft .NET Framework 4.8Microsoft · Microsoft .NET Framework 4.8.1Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2012 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Related CVEs — Microsoft .NET Framework 3.5 AND 4.7.2
In the same product, most dangerous first.
CVE-2024-29059HIGH.NET Framework Information Disclosure VulnerabilityEPSS 98.6%KEVCVE-2023-36899HIGHASP.NET Elevation of Privilege VulnerabilityEPSS 76.7%CVE-2023-36049HIGH.NET, .NET Framework, and Visual Studio Elevation of Privilege VulnerabilityEPSS 6.8%CVE-2020-1108—.NET Core & .NET Framework Denial of Service VulnerabilityEPSS 6.5%CVE-2026-50649HIGH.NET Remote Code Execution VulnerabilityEPSS 4.0%CVE-2026-50646HIGH.NET Framework Remote Code Execution VulnerabilityEPSS 4.0%